On Tue, 17 Aug 2021 01:26:39 +0100, Jing Zhang <[email protected]> wrote: > > Add a new stat that counts the number of times a remote TLB flush is > requested, regardless of whether it kicks vCPUs out of guest mode. This > allows us to look at how often flushes are initiated.
nit: this is a very x86-centric view of things. On arm64, TLB invalidation is broadcast in HW, and does not interrupt the guest execution. > > Original-by: David Matlack <[email protected]> > Signed-off-by: Jing Zhang <[email protected]> > --- > arch/arm64/kvm/mmu.c | 1 + > include/linux/kvm_host.h | 3 ++- > include/linux/kvm_types.h | 1 + > virt/kvm/kvm_main.c | 1 + > 4 files changed, 5 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c > index 0625bf2353c2..f5bb235bbb59 100644 > --- a/arch/arm64/kvm/mmu.c > +++ b/arch/arm64/kvm/mmu.c > @@ -80,6 +80,7 @@ static bool memslot_is_logging(struct kvm_memory_slot > *memslot) > */ > void kvm_flush_remote_tlbs(struct kvm *kvm) > { > + ++kvm->stat.generic.remote_tlb_flush_requests; > kvm_call_hyp(__kvm_tlb_flush_vmid, &kvm->arch.mmu); > } We already have this queued for 5.15 [1]. Thanks, M. [1] https://lore.kernel.org/r/[email protected] -- Without deviation from the norm, progress is not possible. _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
